You sound as if you are a strong person ga, someone who will not be easily scared until there is something to be scared about. You know that this will very likely turn out to be nothing to worry about, so why put your DH through the worry, spoiling his adventure and his special time saying goodbye to a lifelong friend? I'm sure that under any other circumstances you would have told him right away, but these are special circumstances, once-in-a-lifetime circumstances.
I do so understand why you feel you want to keep this to yourself for the time being. And, as you say, he can be on a flight home and be with you in a very short time if you find that you do after all need him.
I really wish you all the best, both of you, and hope the outcome is as you expect so that your DH can enjoy his goodbyes and his cycle home. And I hope he doesn't get too cross with you 
Good luck 
Positive news, positive thoughts, happy weekend.





